Aerosmith frontman Steven Tyler has asked Donald Trump to stop using his music at campaign events without permission.

Attorneys for Tyler sent the Trump campaign a cease-and-desist letter on Saturday, telling the real estate mogul and Republican presidential hopeful to stop using Aerosmith's "Dream On."

According to the letter, the campaign's use of the song "gives the false impression that he is connected with or endorses Mr. Trump's presidential bid."

An attorney for Tyler said in a statement that the letter was not a sign of a personal issue, but a matter of permission and protecting artists' copyright.

"Steven wrote 100% of 'Dream On,' and this is about the unauthorized use of his property," attorney Dina LaPolt said.

The letter was a follow-up to a previous request for Trump to not use Aerosmith music after an Aug. 21 event. Tyler and his attorneys are now requesting compliance within 24 hours, or they could take other legal actions.